CN2798223Y

CN2798223Y - Performance parameter detection and faulting diagnosis equipment for refrigerator

Info

Publication number: CN2798223Y
Application number: CN 200520057374
Authority: CN
Inventors: 郑兆志
Original assignee: Shunde Vocational and Technical College
Current assignee: Shunde Vocational and Technical College
Priority date: 2005-04-16
Filing date: 2005-04-16
Publication date: 2006-07-19
Anticipated expiration: 2015-04-16

Abstract

The utility model relates to performance parameter detection and faulting diagnosis training equipment for a refrigerator, which comprises an amplifying control circuit board of the refrigerator. The utility model is characterized in that the utility model also comprises an illuminating lamp L1 simulating and tracking the running state, an indicator lamp of a heating pipe of a water receiving tank, an indicator lamp of a defrosting heating pipe, an indicator lamp of a fan motor, an indicator lamp of a compressor, a temperature changing signal lamp and a refrigerating chamber signal lamp which are connected with the circuit board through plugs X101. The utility model also comprises an adjustable potentiometer capable of quickly adjusting the temperature so as to enhance the experimental efficiency and simulating a temperature-sensing head of the refrigerating chamber, an adjustable potentiometer capable of simulating a temperature-sensing head of an evaporator R, an adjustable potentiometer capable of simulating a temperature-sensing head of a temperature changing chamber, and an adjustable potentiometer capable of simulating a temperature-sensing head of an evaporator F, and all the adjustable potentiometers are connected with the circuit board through sockets X102. The industrial frequency electricity is connected with the circuit board through the plugs X101. The utility model also comprises a data display device, a loudspeaker and a switch button which are connected with the circuit board through sockets X103. The circuit board is also provided with more than ten failure setting switches arranged in the methods of analysis and experiment comparison. The utility model has the advantages of convenient electric exhibition, function demonstration, convenient analysis and measurement, quick failure management, etc.

Description

The refrigerator performance parameter detects and the fault diagnosis Practical training equipment

(1) technical field

The utility model relates to a kind of refrigerator performance parameter and detects and the fault diagnosis Practical training equipment.

(2) background technology

Existing domestic relevant refrigerator experimental facilities is directly to select comparatively traditional mechanically controlled type single round-robin system cooling system, R12 cold-producing medium refrigerator product to observe and simply temperature survey as operation, do not select the refrigerator of the floride-free frostless microcomputerized control of the two circulations of present latest domestic technology-separation, the refrigerator that adopts Advanced Control Techniques is not carried out analysis and the research of system yet. Existing refrigerator experimental bench mostly is simply four most of connections of refrigeration system, only show as principle, but not true refrigerator does not have good coupling, just can not get real operating condition yet. The parameter that detects or show is very few, and gaging pressure and read freezing, refrigerated storage temperature with thermometer is analyzed the operating mode difficulty simply. Can not regulate the filling quantity of cold-producing medium, also just can't analyze the filling quantity of cold-producing medium to the impact of refrigerator performance. Can not adjust capillary pipe length, also just can't analyze capillary pipe length to the refrigerator performance impact. Only utilize circuit diagram to carry out the control principle analysis, can not carry out direct material object display, function presentation, circuit analysis, signal measurement under the running status to microcomputer-controlled circuit board, the fault that also is far from being setting and eliminating, and can not directly observe and the contact circuit plate, bring like this problem be that the student only can understand circuit theory diagrams but is unfamiliar with real circuit board, cause the defective of skill training.

(3) utility model content

The purpose of this utility model provides a kind ofly can control that function is showed to refrigerator, function presentation and can carry out circuit analysis, fault setting, signal measurement and fix a breakdown, operation electrical quantity in the display refrigerator running, accurately gather the state parameter that also shows refrigeration system multiple spot pressure, temperature and change, the flow of regulation and control refrigeration system refrigeration and the refrigerator performance parameter that breakdown of refrigeration system is set detect and the fault diagnosis Practical training equipment.

In order to achieve the above object, the utility model is to realize like this, the refrigerator control circuit board that comprises amplification, it is characterized in that: it also comprises illuminating lamp L1, water receiving tank heating tube indicator lamp L2, defrosting heating tube indicator lamp L3, fan electromotor indicator lamp L4, compressor indicator lamp L5, alternating temperature signal light L6 and the refrigerating chamber signal light L7 of the simulation tracing of running status, and they connect with wiring board by plug X101; Also comprise fast regulating temperature with adjustable potentiometer R, the adjustable potentiometer RV of simulation R evaporimeter temperature-sensitive head, the adjustable potentiometer F of simulation temperature-changing chamber temperature-sensitive head and the adjustable potentiometer FV of simulation F evaporimeter temperature-sensitive head of the simulation refrigerating chamber temperature-sensitive head of raising conventional efficient, they connect with wiring board by socket X102; The power frequency electricity connects with wiring board by plug X101; Also comprise data display equipment, loudspeaker and shift knob, they connect with wiring board by socket X103; Also have in the circuit board by the fault more than 10 of analyzing and the experiment control methods arranges switch is set.

The utility model further is improved to, be provided with altogether in the circuit board 33 breakdown switches, wherein the power unit at wiring board is provided with six breakdown switch W2, W21, W24, W31, W34 and W35, delay circuit at wiring board partly is provided with two breakdown switch W3 and W4, reset circuit at wiring board partly is provided with a breakdown switch W33, oscillating circuit at wiring board partly is provided with a breakdown switch W5, temperature control circuit at wiring board partly is provided with a breakdown switch W25, door switch control circuit at wiring board partly is provided with six breakdown switch W7, W8, W9, W10, W15 and W16, zero cross detection circuit at wiring board partly is provided with four breakdown switch W11, W12, W13 and W14, Drive and Control Circuit partly is provided with four breakdown switch W1, W20, W22 and W32, part is provided with a breakdown switch W27 on the sound discharge road of wiring board, central processing department at wiring board is arranged with four breakdown switch W18, W19, W6, W28, display circuit at wiring board partly is provided with two breakdown switch W26, is provided with a breakdown switch 29 at the key part of wiring board.

The utility model further is improved to, and also is provided with in the circuit board resistance R a, Rb and the Rc of the interference, deadlock and the component wear that prevent circuit signal; Wherein resistance R a connects with switch W28, resistance R b one termination power, and an end of another termination capacitor C 96, resistance R c connects with switch W18.

The utility model compared with prior art has following advantage:

1, design microcomputer control panel wiring diagram is made printed circuit board (PCB), and it can make things convenient for circuit displaying, function presentation, be convenient to analyze and measure, fast arrange the microcomputer-controlled circuit board of fault;

2, analyze microcomputerized control principle and common fault type, the plan of establishment detection method of the localization of faults;

3, utilize science and effective means, major failure is set and does not damage system and circuit board at refrigeration system of refrigerator and electric control system, and recovery system normally moves after fixing a breakdown;

4, measure refrigerator operation electrical quantity, gather the main hot state parameter of refrigeration system;

5, the microcomputerized control experimental bench can connect refrigerator and carries out actual motion operation control, also can carry out simulated operation by change-over circuit, greatly reduces the expense of experimental facilities;

6, cooperate the study of microcomputer control circuit, can carry out the fault setting, can also regulate and accurately control filling quantity of refrigerant, the filling quantity of demonstration cold-producing medium is on the impact of refrigerator, adjust capillary pipe length, demonstrate capillary pipe length to the impact of refrigerator performance, the phenomenon of the failure that quick-setting and demonstration refrigrant leakage and refrigeration system are stopped up.

(4) description of drawings

Fig. 1 and Fig. 2 are circuit theory diagrams of the present utility model.

(5) specific embodiment

Below in conjunction with drawings and Examples the utility model is done further detailed description

As shown in Figure 1, 2, the refrigerator control circuit board that comprises amplification, it go back the capable state of contracted affreightment simulation tracing draw together illuminating lamp L1, water receiving tank heating tube indicator lamp L2, defrosting heating tube indicator lamp L3, fan electromotor indicator lamp L4, compressor indicator lamp L5, alternating temperature signal light L6 and refrigerating chamber signal light L7, they connect with wiring board by plug X101; Alternating temperature signal light L6 and refrigerating chamber signal light L7 reflect the on off state of magnet valve jointly; Also comprise fast regulating temperature with adjustable potentiometer R, the adjustable potentiometer RV of simulation R evaporimeter temperature-sensitive head, the adjustable potentiometer F of simulation temperature-changing chamber temperature-sensitive head and the adjustable potentiometer FV of simulation F evaporimeter temperature-sensitive head of the simulation refrigerating chamber temperature-sensitive head of raising laboratory efficient, they connect with wiring board by socket X102; The power frequency electricity connects with wiring board by plug X101; Also comprise data display equipment, loudspeaker and shift knob, they connect with wiring board by socket X103. Be provided with altogether in the circuit board 33 breakdown switches, wherein the power unit of wiring board comprises adjustable resistance Rv7 fuse F1, bridge rectifier V1-V4, capacitor C 1-C5, C75, C76, inductance L 75 and resistance R 51, R52, R71, be provided with six faults in this part and open this pass W2, W21, W24, W31, W34 and W35, switch W2 is located at the output of resistance R 71, switch W21 is located at the input of power supply, switch W24 is located at the output of inductance L 75, switch W31 is located at the input of bridge rectifier, and switch W34 is located at the output of bridge rectifier, and switch W35 is located between capacitor C 4, the C5. The delay circuit of wiring board partly comprises resistance R 51, R52, capacitor C 51 and diode V51, and this part is provided with two breakdown switch W3 and W4, and switch W3 is connected in parallel on the two ends of capacitor C 51, and switch W4 connects with resistance R 52. The reset circuit of wiring board partly comprises resistance R 83, capacitor C 83 and diode V83, and this part is provided with a breakdown switch W33, and switch W33 is in parallel with capacitor C 83. The oscillating circuit of wiring board partly is a crystal, and this part is provided with a breakdown switch W5, and this switch W5 is located at an output of crystal. The temperature control circuit of wiring board partly has a socket, and the first-class socket of this socket and aforementioned refrigerating chamber temperature-sensitive matches, and breakdown switch W25 is located on this socket. The door breakdown switch control circuit of wiring board partly comprises resistance R 18-R33 and capacitor C 30-C33, capacitor C 18, C19, C25, this part is provided with six breakdown switch W7, W8, W9, W10, W15 and W16, switch W7, W8, W15 and W16 are connected on respectively the output of socket X102, switch W10 is in parallel with capacitor C 19, and switch W9 connects with resistance R 25. The zero cross detection circuit of wiring board partly comprises triode V14, V15, diode V11, resistance R 11-R15 and capacitor C 12, C14, C15, this part is provided with four breakdown switch W11, W12, W13 and W14, switch W11 is connected in parallel on the two ends of capacitor C 15, switch W12 is attempted by between the base stage and colelctor electrode of triode V15, and switch W13 is attempted by between the base stage and colelctor electrode of triode V14, and switch W14 is connected in parallel on the two ends of capacitor C 12. Drive and Control Circuit partly comprises relay K 2-K6, photocoupler E1, controllable silicon V96, resistance R 91-R96 and capacitor C 91, C96, this part is provided with four breakdown switch W1, W20, W22 and W32, and switch W1 is attempted by on the normally opened contact of relay K 5, and switch W20 is connected on the relay K 6, switch W22 connects with resistance R 93, and switch W32 connects with the normally opened contact of relay K 2. The sound discharge road part of wiring board comprises triode V202, resistance R 204, R205, and loudspeaker B201 and capacitor C 201 are provided with a breakdown switch W27 in this part, switch one end ground connection, the end of other end connecting resistance R205. The central processing portion of wiring board comprises chip D2, resistance R 7, resistance R 41-R48, resistance R 85 and capacitor C 41-C47, capacitor C 85, C86, this part is provided with four breakdown switch W18, W19, W6, W28, switch W18 connects with resistance R 7, switch W19 one end ground connection, the end of other end connecting resistance R41,11 pin of switch W6 one chip termination D2, other end combination hub X103. The display circuit of wiring board partly comprises display chip D201, resistance R 206-R210 and capacitor C 205-C207, and this part is provided with a breakdown switch W26, and this switch is connected with resistance R 206. Key part at wiring board is provided with a breakdown switch 29, and it is connected on the output of socket X201. Prevent in addition in the circuit board resistance R a, Rb and the Rc of interference, deadlock and the component wear of circuit signal; Wherein resistance R a connects with switch W28, resistance R b one termination power, and an end of another termination capacitor C 96, resistance R c connects with switch W18.

During use, the method to set up of fault and detection method such as following table: ON-connects OFF-and disconnects

Switch number	The fault title	Fault produces way	Phenomenon of the failure	Detection method
Switch number	The fault title	Fault produces way	Phenomenon of the failure	Detection method	W1	The K5 contact short	ON	The energising fan electromotor has output uncontrolled	Survey N2 the 12nd pin voltage normally for 0.7V left and right sides K2 work N2 voltage is about 11.5V, K2 does not work
W2	The R71 open circuit	OFF	Energising again outage powers on again again and originally set data and can not store	Surveying D1 the 8th pin voltage is the normal 5V that is, undesired is 0V	W1	The K5 contact short	ON	The energising fan electromotor has output uncontrolled
W2	The R71 open circuit	OFF			W3	The C51 short circuit	ON	Energising cuts off the power supply for powering on again more again press in 3 seconds	Survey the V51 cathode voltage for normally slowly rising to about 4.7V for the voltage of C51
W4	R52 opens circuit	OFF	The press output such as the power on start that powered in 3 minutes of cutting off the power supply again, press no-output in 3 second	V 51 cathode voltages are that the above voltage of undesired 4V also becomes when surveying outage, are by the 4.7V slow decreasing normally	W3	The C51 short circuit	ON
W4	R52 opens circuit	OFF			W5	4M crystal oscillator open circuit	OFF	The energising buzzer is long to be rung	It is normal for 1V has waveform surveying D2 the 2nd pin voltage, and undesired is that 1V is without waveform
W6	The C73 short circuit	ON	Button reactionless (closing the freezing positive temperature adjustment of freezing, freezing temperature adjustment) displays temperature is undesired	The voltage of surveying capacitor C 73 is the normal 0V that is, abnormal voltage is 0V (normally presses freezing key voltage change is arranged)	W5	4M crystal oscillator open circuit	OFF	The energising buzzer is long to be rung
W6	The C73 short circuit	ON			W7	F evaporimeter temperature-sensitive head open circuit	OFF	The normal refrigerating chamber that powers on is 0 ℃, and temperature-changing chamber shows E4.	When the voltage of surveying R33 is normal below the 4V, the undesired 5V that approximates
W8	Refrigerating chamber temperature-sensitive head open circuit	OFF	The refrigerating chamber that powers on shows E1	When the voltage of surveying R30 is normal below the 4V, the undesired 5V that approximates	W7	F evaporimeter temperature-sensitive head open circuit	OFF
W8		OFF	The refrigerating chamber that powers on shows E1		W9	The C25 short circuit	ON	It is reactionless to press the temperature-changing chamber door switch	About 1.7V, undesired was 0V when the voltage of surveying R25 was normal
W10	The R19 open circuit	OFF	It is reactionless to press the refrigerating-chamber door switch	0V when survey D2 the 14th pin voltage is normal, undesired have waveform for pressing the 5V oscillograph about 4.7V	W9	The C25 short circuit	ON
W10	The R19 open circuit	OFF			W11	V15 short circuit CE pin	ON	Energising is exported without magnetic valve	Surveying V15CE pin voltage undesired is 0V, normally is 1.96V
W12	V15 short circuit CB pin	ON	Energising is exported without magnetic valve	Surveying V15CB pin voltage undesired is 0V, normally is 1.3V	W11	V15 short circuit CE pin	ON	Energising is exported without magnetic valve
W12	V15 short circuit CB pin	ON	Energising is exported without magnetic valve		W13	The V14 short circuit	ON	Energising is exported without magnetic valve	Surveying V14CE pin voltage undesired is 0.6V, normally is 0.7V
W14	The C12 short circuit	ON	Energising is exported without magnetic valve	Surveying V14BE pin voltage undesired is 0V, normally is 0.78V	W13	The V14 short circuit	ON	Energising is exported without magnetic valve
W14	The C12 short circuit	ON	Energising is exported without magnetic valve		W15	R evaporimeter temperature-sensitive head open circuit	OFF	Energising temperature-changing chamber temperature shows E2 (generally not showing)	When the voltage of surveying R31 is normal below the 4V, the undesired 5V that approximates
W16	Temperature-changing chamber temperature-sensitive head open circuit	OFF	The energising temperature of refrigerating chamber shows E3	When the voltage of surveying R32 is normal below the 4V, the undesired 5V that approximates	W15	R evaporimeter temperature-sensitive head open circuit	OFF

W18	The 28th pin of D2 has output	ON	The energising illuminating lamp is bright	Abnormal voltage is 3V, normally is 0V
W18	The 28th pin of D2 has output	ON	The energising illuminating lamp is bright	Abnormal voltage is 3V, normally is 0V	W19	The 20th pin no-output of D2	ON	Export without magnetic valve	Abnormal voltage is 0V, normally is more than the 3V
W20	The K6 open coil	OFF	Compressor-free output	Surveying N2 the 11st pin voltage normally is 7V, and undesired is (the compressor-free output state is measured as a result) about 0.5V	W19	The 20th pin no-output of D2	ON	Export without magnetic valve	Abnormal voltage is 0V, normally is more than the 3V
W20	The K6 open coil	OFF	Compressor-free output		W21	The primary open circuit	OFF	Complete machine is not worked	The secondary alternating voltage of surveying transformer normally is 11.5V, and undesired is 0V
W22	The E1 open circuit	OFF	Without temperature-changing chamber, the output of refrigerating chamber signal lamp	Surveying N2 the 10th pin voltage normally is about 15V, and undesired is 0V	W21	The primary open circuit	OFF	Complete machine is not worked
W22	The E1 open circuit	OFF			W24	The L75 open circuit	OFF	Do not work in the display part, buzzer does not ring	Surveying 78L05 the 3rd pin voltage normally is more than the 15V, and undesired is 0V
W25	The short circuit of refrigerating chamber temperature-sensitive head	ON	The temperature of refrigerating chamber that powers on shows E1	Surveying R30 voltage is normally to be more than the 0.5V, and the undesired 0V of being shows E1	W24	The L75 open circuit	OFF	Do not work in the display part, buzzer does not ring
W25		ON			W26	The D201 no-output	OFF	Backlight uncontrolled	The voltage of surveying R203 is normal for below the 0.3V, and (measuring under slave mode) is undesired to be 2.7V
W27	D201 the 12nd pin short circuit	ON	Buzzer does not ring	When the voltage of surveying R205 is normal more than the 0.5V, (having the buzzer output state to measure) undesired to be 0V	W26	The D201 no-output	OFF	Backlight uncontrolled
W27	D201 the 12nd pin short circuit	ON	Buzzer does not ring		W28	The C42 electric leakage	ON	Compressor-free output	Survey N2 the 6th pin voltage and normally measure under the output state for having about 3V, undesired is about 0.3V
W29	The R80 resistive-open	OFF	Press and timely lock that key, fast cooling rate freeze key, negative temperature adjustment key is reactionless	Survey D2 the 5th pin voltage normally for voltage change is arranged, undesiredly do not change (state measurement pushes button)	W28	The C42 electric leakage	ON	Compressor-free output
W29	The R80 resistive-open	OFF			W31	The transformer secondary output open circuit	OFF	Complete machine is not worked	Surveying N1 the 1st pin normally is more than the 11V without commutating voltage, and undesired is 0V
W32	The K2 open coil	OFF	Illuminating lamp does not work	Surveying N2 the 15th pin voltage normally is more than the 15V, to measure under the no-output state, and undesired is more than the 1V	W31	The transformer secondary output open circuit	OFF	Complete machine is not worked
W32	The K2 open coil	OFF	Illuminating lamp does not work		W34	V1, V2 open circuit	OFF	Complete machine is not worked	Surveying N1 the 1st pin voltage normally is more than the 12V, and undesired is 0V
W35	The N1 no-output	OFF	Complete machine is not worked, and only has backlight shinny	The voltage of surveying J125 normally is more than the 4.7V, and undesired is 0V	W34	V1, V2 open circuit	OFF	Complete machine is not worked

Claims

1, a kind of refrigerator performance parameter detects and the fault diagnosis Practical training equipment, the refrigerator control circuit board that comprises amplification, it is characterized in that: it also comprises illuminating lamp L1, water receiving tank heating tube indicator lamp L2, defrosting heating tube indicator lamp L3, fan electromotor indicator lamp L4, compressor indicator lamp L5, alternating temperature signal light L6 and the refrigerating chamber signal light L7 of the simulation tracing of running status, and they connect with wiring board by plug X101; Also comprise fast regulating temperature with adjustable potentiometer R, the adjustable potentiometer RV of simulation R evaporimeter temperature-sensitive head, the adjustable potentiometer F of simulation temperature-changing chamber temperature-sensitive head and the adjustable potentiometer FV of simulation F evaporimeter temperature-sensitive head of the simulation refrigerating chamber temperature-sensitive head of raising conventional efficient, they connect with wiring board by socket X102; The power frequency electricity connects with wiring board by plug X101; Also comprise data display equipment, loudspeaker and shift knob, they connect with wiring board by socket X103; Also have in the circuit board by the fault more than 10 of analyzing and the experiment control methods arranges switch is set.

2, refrigerator performance parameter according to claim 1 detects and the fault diagnosis Practical training equipment, it is characterized in that: be provided with altogether in the circuit board 33 breakdown switches, wherein the power unit at wiring board is provided with six breakdown switch W2, W21, W24, W31, W34 and W35, delay circuit at wiring board partly is provided with two breakdown switch W3 and W4, reset circuit at wiring board partly is provided with a breakdown switch W33, oscillating circuit at wiring board partly is provided with a breakdown switch W5, temperature control circuit at wiring board partly is provided with a breakdown switch W25, door switch control circuit at wiring board partly is provided with six breakdown switch W7, W8, W9, W10, W15 and W16, zero cross detection circuit at wiring board partly is provided with four breakdown switch W11, W12, W13 and W14, Drive and Control Circuit partly is provided with four breakdown switch W1, W20, W22 and W32, part is provided with a breakdown switch W27 on the sound discharge road of wiring board, central processing department at wiring board is arranged with four breakdown switch W18, W19, W6, W28, display circuit at wiring board partly is provided with two breakdown switch W26, is provided with a breakdown switch 29 at the key part of wiring board.

3, refrigerator performance parameter according to claim 1 and 2 detects and the fault diagnosis Practical training equipment, it is characterized in that: resistance R a, the Rb and the Rc that also are provided with in the circuit board the interference, deadlock and the component wear that prevent circuit signal; Wherein resistance R a connects with switch W28, resistance R b one termination power, and an end of another termination capacitor C 96, resistance R c connects with switch W18.